Furnace.



No. 654,l75. Patented July 24, I900. D. S. MGGBEGDR & 3. B LUCKLIN. I.s. smronn, Administrator of n. s. mcsnion, Dec'd.

FURNACE. 7 (Application fllad Aug. 24, 189B.)

2 Shuts-Sheet (No Model.)

Patented July 24, 1900'.

2 Sheets-Sheet 2,

D. S. MBGREGOB & S. B. LOCKLIN.

1. s. BAMFORD, Administr ahar of n. s. McGBEGOB, Dec'd. (No Model.)FURNACE (Application filed Aug. 24, 1888.)

n: uoams PiYERS cc moraunm WASHINGTON, n. c.

' air and steam.

DANIEL S. MCGREGOR AND SAMUEL 13.. LOOKLIN, OF BOSTON, MASSACHU- SETTS;JOHN S. BAMFORD ADMINISTRATOR OF SAID MCGREGOR, DE-

CEASED.

FURNACE.

SPECIFICATION forming part of Letters Patent No. 654,175, dated July 24,1900.

Application filed August 24, 1898. Serial No. 689,418. (No model.)

T0 at whom it may concern:

Be it known that we, DANIEL S. MOGREGOR and SAMUEL B. LOOKLIN, ofBoston, in the county of Suffolk and State of Massachusetts, haveinvented new and useful Improvements in Furnaces, of which thefollowing, taken in connection with the accompanying drawings, is aspecification.

Our invention consists in certain appliances to be used in connectionwith furnaces by the aid of which combustion is much improved and thesmoke and other combustible matter are completely utilized by conversioninto a smokeless product of combustion, the object being to prevent theformation of smoke in furnaces by commingling in the fire-box certaincombination of hot and cold This object is attained by the mechanismshown in the accompanying drawings, in which- Figure 1 is a sketch inperspective showing the arrangement of the steam and air pipes leadinginto the fire-box. Fig. 2 is a horizontal section showing the fire-boxand steam and air pipes. Fig. 3 is a vertical section showing detailsenlarged.

In the drawings we have shown our apparatus as applied to a steam-boilerfurnace; but we do not wish to confine ourselves to this application, asour invention, slightly modified, will apply to any furnace.

Our object is to prevent the formation of smoke by securing perfectcombustion, and this may be done in almost any furnace by the use of oursystem of introducing air (hot and cold) and steam properly proportionedand commingled.

In the drawings, D represents the front of a boiler-furnace. S is asteam-pipe leading from any convenient part from which steam may betaken. The lower end of this pipe connects with the pipe 0, which passesin under the grate E, Fig. 2, and is indicated by the letter C Thence itpasses to the pipe O in the bridge-Wall D. The pipe 0 is perforated, asindicated at P P, through which steam passes to the slot P in the upperface of the said bridge-wall. An air-pipe C O passes through the frontwall of the furnace and enters the steam-pipe O ,as shown 'mitted to thebridge-wall may also be regulated, as well as the proportion of steamandair. The amount of combined air andsteam, as well as the proportions topass in by the bridge-wall, are to be governed by the kind offuel andthe condition of the fire.

WVe will now describe the devices for intro ducing air and steam intothe fire-box from the front.

The steam-pipe S has a branch S leading along the front, as shown inFigs. 1 and 2, which has connections S S S leading to pipes T T T. Eachof the pipes T has a valve T controlled by the valve-stem T andhandwheel T The pipes T are all alike and are each provided with thesame connections and are constructed and arranged as shown in detail inFig. 3. The number of these pipes can be varied to suit the style andsize of the furnace. Referring to Fig. 3, the pipe T receives steam fromthe pipe S and its connections and delivers it to the pipe T the amountbeing regulated by the valve T. A pipe.A admits cold air to the space H,surrounding the steampipe T, and passing through the passages c c entersthe commingling-chamber K, where it mingles with the steam from the pipeT Hot air and gas of incomplete combustion from the interior of thefire-box pass through the pipe or conduit H into the space 72, near theoutlet of the steam-pipe T and the cold-air passages c c and thence tothe chamber K in the nozzle N, where the steam, cold air, and hot airand gas all combine and pass into the firebox through the opening N,across the path of the products of combustion at the rear of thecombustion-chamber. The nozzle N has near its orifice l a deflector Nwhich serves to interrupt the free flow of the air and steam, and thuscauses it to be still more thoroughly mixed.

The several air-pipes can have valves or dampers of ordinaryconstruction, so as to completely control the amounts of hot and coldair to be admitted in conjunction with the steam.

We claim- In a furnace of the class described, the com- 5 bination of aeommingling-chamber, a nozzle communicating therewith and arranged todischarge into the combustion-chamberabove the fuel, gas and airconduits communicating with the commingling-chamber,1a steam-jet 10arranged to induce currents of air and gas through said air and gasconduits, and means for delivering commingled air and steam across thepath of the products of combustion at the rear of the fuel-chamber,substantially as and for the purpose set forth.

In testimony whereof we have signed our names to this specification, inthe presence of two subscribing Witnesses, on this 27th day of July, A.D. 1898.

DANIEL S. MCGREGOR. SAMUEL B. LOOKLIN. Witnesses:

EDWARD S. DAY, FRANK G. HATTIE.

